Hi Sascha, I am hoping to look at your code on Thursday. But as others have reported IO performance is currently not good. Also, we have been working on fixing the thread busy waiting issue but the code is not complete yet. I may have something for you to test in a few weeks but there is no precise ETA for this feature yet.
The -NO_STEALS option is no longer relevant for the trunk. The default stealing strategy has been updated to make it more conservative making the option unnecessary. In any case, it does not magically resolve the busy waiting issue. Olivier Sascha Roloff <sascha.rol...@googlemail.com> wrote on 01/18/2011 05:41:47 AM: > From: Sascha Roloff <sascha.rol...@googlemail.com> > To: tetsu.soh....@gmail.com, Mailing list for users of the X10 > programming language <x10-users@lists.sourceforge.net> > Date: 01/18/2011 05:43 AM > Subject: Re: [X10-users] X10_NTHREADS slowdown with IO > > Hi Minor and Josh, > > thank you for your response, I also thought about parallel IO. It would be > very nice to have a support for this, because it's demotivating, when your > calculations can profit from more threads and your IO-Task is killing the > won performance. So, please let us know, if the support is ready. I alwaye > use the latest SVN download, so I don't have to wait for a new public > release. > > Thanks, > Sascha > > > 2011/1/18 Tetsu Soh <tetsu.soh....@gmail.com> > > > On Tue, 18 Jan 2011 07:49:41 +0900, Josh Milthorpe > > <josh.miltho...@anu.edu.au> wrote: > > > > Hi Josh, > > > > > Unfortunately, those threads are "busy waiting", and constantly > > > interrupting the IO thread to attempt to steal work. This is known to > > > slow down single threaded sections. > > > https://jira.codehaus.org/browse/XTENLANG-1012 > > > > > > > > > I has tried to use the -NO_STEALS option to disable the job steals but it > > has no effect at all. > > So, does the -NO_STEALS mean different things? > > > > Thanks, > > -Tetsu > > > > > > > ------------------------------------------------------------------------------ > > Protect Your Site and Customers from Malware Attacks > > Learn about various malware tactics and how to avoid them. Understand > > malware threats, the impact they can have on your business, and how you > > can protect your company and customers by using code signing. > > http://p.sf.net/sfu/oracle-sfdevnl > > _______________________________________________ > > X10-users mailing list > > X10-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/x10-users > > > ------------------------------------------------------------------------------ > Protect Your Site and Customers from Malware Attacks > Learn about various malware tactics and how to avoid them. Understand > malware threats, the impact they can have on your business, and how you > can protect your company and customers by using code signing. > http://p.sf.net/sfu/oracle-sfdevnl > _______________________________________________ > X10-users mailing list > X10-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/x10-users ------------------------------------------------------------------------------ Protect Your Site and Customers from Malware Attacks Learn about various malware tactics and how to avoid them. Understand malware threats, the impact they can have on your business, and how you can protect your company and customers by using code signing. http://p.sf.net/sfu/oracle-sfdevnl _______________________________________________ X10-users mailing list X10-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/x10-users
